The given truth table is correct for:
$P: 1, 1, 0, 0$
$Q: 1, 0, 1, 0$
$R: 1, 0, 0, 0$

The following logic gate circuit is equivalent to which of the following gates?

For the given combination of logic gates,the inputs $A, B$ and $C$ are as follows. If $A=B=C=0$ and $A=B=1, C=0$,then the logic states of output $D$ are respectively:

$A$ building has two overhead water tanks, each fitted with a sensor $(S_1, S_2)$ which goes to $0$ when the water level in the tank falls below a set value and remains $1$ otherwise. $A$ common pump is used to raise water from an underground storage tank to these overhead tanks. Of the following circuits, which one will turn on $(P = 1)$ the pump only when at least one of the tanks has a water level below the set value?

The $NOR$ gate is a combination of which two gates?

For a two-input $AND$ gate,the four entries are shown in the truth table. Identify the correct ones out of these ($A, B =$ input,$Y =$ output).

Entry	$A$	$B$	$Y$
$1$	$0$	$1$	$0$
$2$	$1$	$0$	$0$
$3$	$1$	$1$	$1$
$4$	$0$	$0$	$1$